Massac County RainfallUnited StatesILMassac County30%Metropolis 30% Chance 25%Brookport 25% Chance 35%Mermet Lake 35% Chance Big BayBoazBrookportCretaceous Hills Nature PreserveFort Massac State ParkHillermanJoppaMassac Forest Nature PreserveMermetMermet LakeMetropolisMetropolis Municipal AirportNew ColumbiaRound KnobSamothShady GroveUnionville